Burp Suite vs OWASP ZAP: Choosing a Web App Security Scanner

Point either tool at a web application and you get the same core capability: a proxy that sits between your browser and the server, letting you read, pause, and rewrite every request. What separates Burp Suite and OWASP ZAP is everything around that proxy — what you can automate without paying, how much friction the interface adds, and whether the scanner fits into a build pipeline. Here is the honest breakdown.

The short version

Both are mature, both are used on real engagements, and neither is going away. The decision usually comes down to how you spend your time.

• Choose Burp Suite if manual testing is your main job. The interface, history, and request-editing tools are smoother, and Burp Suite Professional adds an active scanner that is hard to beat for depth on tricky apps.
• Choose OWASP ZAP if you need free automated scanning, especially in CI. The active scanner is included at no cost, and the Docker images make scheduled scans genuinely easy.
• Use both if you can. ZAP catches regressions in a pipeline; Burp Pro digs into the business logic and access-control bugs no scanner finds.

Manual testing: proxy, repeater, and daily workflow

Burp's flow is the one most testers learn first: browse through the proxy, right-click a request in HTTP history, send it to Repeater, and iterate. Intruder handles payload fuzzing, Comparer spots differences between two responses, Decoder handles encoding. The pieces fit together with almost no setup, which is why it feels fast after a day or two.

ZAP offers equivalents — Break points, the Manual Request Editor, Requester, the Sites tree, and History — but the information is spread across more tabs and the concepts of Contexts and Users add a layer to configure. Once you internalize that model, ZAP is arguably more flexible: you can define a context for a target, attach authentication, and reuse it across manual and automated work.

One important limitation: Burp Suite Community Edition has no active scanner and throttles Intruder's speed. It is excellent for manual exploration, not for automated crawling. ZAP ships with its scanner in the free download.

Automation and CI/CD

This is where ZAP pulls ahead for most teams. It is built to be driven from the command line and from its API.

• Baseline scan — spiders the app and runs passive rules only. Fast enough to run on every pull request.
• Full scan — spider plus active attacks against a target you are authorized to test.
• API scan — imports an OpenAPI, GraphQL, or SOAP definition and scans the described endpoints, which is often more useful than crawling a JS-heavy single-page app.
• Docker images and an official GitHub Action — no local install, consistent results across machines.

Burp Suite Professional also automates: it exposes a REST API and can run in headless environments so a pipeline can kick off scans and pull reports. Burp Suite Enterprise Edition targets organizations that need scheduled scanning across many applications with a dashboard. The catch is licensing — automation on the Burp side sits behind a paid tier, while ZAP's is free.

Practical tip: whatever you run automatically, keep authenticated scans in mind. An unauthenticated baseline scan of a login-protected app mostly tests the login page. Configure ZAP's authentication and session handling, or feed it a token, if you want coverage worth reading.

Extensions and scripting

Burp's BApp Store covers everything from JWT editors to custom scan checks, with extensions typically written in Java or Kotlin against the Montoya API. ZAP has a Marketplace with add-ons and a scripting engine that supports JavaScript, Python, Groovy, and Zest. Writing a custom passive rule in ZAP is a realistic afternoon task even if you are not a Java developer.

Both expose APIs for orchestration, and both integrate with common proxies, browsers, and reporting formats. If your team already writes scripts in Python, ZAP's ecosystem will feel more natural. If you want polished, maintained tooling that plugs into Burp's UI, the BApp Store is the stronger catalog.

Learning curve

Burp is easier to start with because it hides complexity until you need it. A beginner can intercept a request, change a parameter, and see the result within minutes. ZAP's automated scan wizard is similarly quick, but the manual side asks you to understand Contexts, scopes, and scan policies before results make sense.

For learning, PortSwigger's Web Security Academy is free and pairs naturally with Burp. ZAP's documentation and its community are solid, and the ZAP "Getting Started" material plus the Docker examples will get you productive quickly. Either way, budget a week of deliberate practice on a deliberately vulnerable app before you use the tool on client work.

Pricing and licensing

ZAP is free and open source under the Apache 2.0 license. There is no paid edition, no feature gating, and no per-seat cost. Commercial support is available from vendors if your organization requires it.

Burp Suite has three tiers: Community (free), Professional (a paid annual subscription per user), and Enterprise (priced for organizational deployments). Edition features and prices change, so check the vendor's current page rather than relying on numbers from an old blog post. For a solo tester on a budget, ZAP plus Burp Community covers a surprising amount of ground.

How to decide this week

1. Install both. Burp Community and ZAP take minutes and run on modest hardware.
2. Run a ZAP baseline scan against an app you own, then read the report critically. Half the findings will be headers and cookie flags — that is normal.
3. Spend an hour in Burp Community manually testing a login and a password reset flow. Notice how often you reach for Repeater.
4. Ask yourself three questions: Do I need automated scans in a pipeline? Do I test authenticated apps often? Does my budget allow a Pro license?
5. If automation matters, wire ZAP into one pipeline job before buying anything.

One rule that outranks every feature comparison: only scan systems you have explicit written permission to test. Automated active scanning can be disruptive, and a full scan against a third-party service is not a grey area.

Pick the tool that matches the work in front of you this month, not the one with the longer feature list. You can always switch later — the proxy concepts transfer either way.

Photo: Daniil Komov / Pexels